Parsing error for schema file

[JJadhav]

I have written the following schema file:

<schema xmlns="http://www.w3.org/2001/XMLSchema" 
        xmlns:tns="http://www.abc.com/DDSchema" 
        targetNamespace="http://www.abc.com/DDSchema" 
        elementFormDefault="qualified" 
        version="1.0">
 
         <complexType name="PSType">
             <element ref="tns:ProfileName" maxOccurs="unbounded"/>        
       </complexType>
 
  <element name="ProfileName" type="string"/>
  <element name="ProfilesSummary" type="tns:PSType"/>
</schema>
 

while parsing i am getting the following exception:
[ERROR] s4s-elt-invalid-content.1: The content of 'PSType' is invalid. Element 'element' is invalid, misplaced, or occurs too often.

I want to write the above schema for the sample xml:

<ProfilesSummary>
  <ProfileName>cat</ProfileName>
  <ProfileName>dog</ProfileName>
  <ProfileName>rat</ProfileName>
</ProfilesSummary>
 

Can someone please help? Thanks a lot !

[jkmyoung]

The element inside the complexType needs to be nested inside of a sequence.

<complexType name="PSType">
    <sequence>
        <element ref="tns:ProfileName" maxOccurs="unbounded"/>
    </sequence>
</complexType>